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Presentation - people.vcu.edu
Presentation - people.vcu.edu

13-Krebs cycle
13-Krebs cycle

13-Krebs cycle
13-Krebs cycle

Gene Expression
Gene Expression

... responses to stimuli in the environment to keep you alive. For example, when you are frightened, the DNA tells your adrenal cells to produce adrenaline which will help you respond to the situation. ...
Degradation of Amino Acids
Degradation of Amino Acids

... because NH4+  glutamate  other AA by transamination. (iii) GDH is the major AA oxidative pathway and the major source of NH4+ Also provides directionality to transamination/GDH. In vivo,  [GLU] , NAD+ & removal of NH4+ drive deamination of glutamate. With excess NH4+ (bacterial metabolism in inte ...
SPECIFIKÁCIÓS TÁBLÁZAT Vegyszer neve Specifikáció Kiszerelés
SPECIFIKÁCIÓS TÁBLÁZAT Vegyszer neve Specifikáció Kiszerelés

... Isolation of RNA from 1 kit/50 prep. small sample quantities. rDNase included for oncolumn DNA removal. (For RT-PCR) It must contain Enzyme Mix, Reaction Mix, Loading Mix. The Enzyme Mix must contain: Reverse Transcriptase, RNase Inhibitor and DNA Polymerase. The Reaction Mix contains 1 kit/ 30 prep ...
Aerobic respiration - Wesleyan
Aerobic respiration - Wesleyan

...  Aerobic metabolic pathways (using oxygen) are used by most eukaryotic cells  Anaerobic metabolic pathways (which occur in the absence of oxygen) are used by prokaryotes and protists in anaerobic habitats ...
Professor Jason Raymond - School of Earth and Space Exploration
Professor Jason Raymond - School of Earth and Space Exploration

... Oxygen is the by-product of using water as a source of electrons. The Earth’s geochemical/geological record suggests this process is at least 2.2-2.5 billion years old ...
28 Gluconeogenesis In animals, glucose is required by the brain
28 Gluconeogenesis In animals, glucose is required by the brain

Derived copy of Bis2A 07.3 Oxidation of Pyruvate and the Citric Acid
Derived copy of Bis2A 07.3 Oxidation of Pyruvate and the Citric Acid

... liver. This form produces GTP. GTP is energetically equivalent to ATP; however, its use is more restricted. In particular, protein synthesis primarily uses GTP. Step 6. Step six is a dehydration process that converts succinate into fumarate. Two hydrogen atoms are transferred to FAD, producing FADH2 ...
INTRODUCTION TO CELLULAR RESPIRATION
INTRODUCTION TO CELLULAR RESPIRATION

...  Your muscle cells and certain bacteria can oxidize NADH through lactic acid fermentation – NADH is oxidized to NAD+ when pyruvate is reduced to lactate – In a sense, pyruvate is serving as an “electron sink,” a place to dispose of the electrons generated by oxidation reactions in glycolysis ...
CO 2 - cloudfront.net
CO 2 - cloudfront.net

... energy in the form of ATP BUT don’t forget its also the ways we produce all our heat. • Also don’t forget we can use other sugars, fats and amino acids to produce energy in the form of ATP using these same pathways. • The two major linked mechanisms for achieving this are Glycolysis and Krebs Cycle ...
Chapter 5 - My Teacher Site
Chapter 5 - My Teacher Site

... – One of the monomers provides a hydroxyl group (-OH) and the other provides a hydrogen (-H) to make up for the water molecule that is lost ...
Amino Acid Biosynthesis
Amino Acid Biosynthesis

... • Not the same as amino acid metabolism pathways. – Synthesis of most amino acids is only one or two steps removed from another pathway or cycle. – Missing genes = metabolites not produced. Many metabolites are not essential to the cell. ...
Test Blueprint
Test Blueprint

... eukaryotic cells (TEKS 4A) The student will be able to identify cellular processes including homeostasis, permeability, energy production, transportation of molecules, disposal of wastes, function of cellular parts, and synthesis of new molecules (TEKS 4B) The student will compare the structures and ...
CHAPTER 12 – RESPIRATION
CHAPTER 12 – RESPIRATION

... beginning, four have been made at the end. However, this is not all the ATP which can be made in this process. The conversion of triose phosphate into GP also releases hydrogen ions (H+) and electrons (e-) which are transferred to the coenzyme NAD (nicotinamide adenine dinucleotide) to form reduced ...
How Cell Harvest Energy
How Cell Harvest Energy

... 23. Explain why respiration is considered exergonic. __________________________________________________________________________ __________________________________________________________________________ 24. What is the main reason energy is harvested in stages in respiration ________________________ ...
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... e) All of the above. 6) _____ is used to transport fatty acids into the mitochondria. a) Phytate b) Creatine c) Carnitine d) Acyl carrier protein e) Carrone 7) Fatty acid synthesis begins with the carboxylation of acetyl CoA to form ________. a) Acetoacetyl-CoA b) Butyryl-CoA c) Propionyl-CoA d) Mal ...
oxidation reduction
oxidation reduction

... Reduced NADH and FADH2 are important as they carry electrons which power other stages of respiration. ...
Unit 3: Energy systems
Unit 3: Energy systems

... pyruvate molecules created from glycolysis. When oxygen is present, the mitochondria will undergo aerobic respiration which leads to the Krebs cycle. However, if oxygen is not present, fermentation of the pyruvate molecule will occur, leading to _______________. In the presence of oxygen, when acety ...
LOCATION: CYTOPLASM
LOCATION: CYTOPLASM

... allosteric ...
Second Half of Glycolysis
Second Half of Glycolysis

... Glycolysis Glycolysis is the first step in the breakdown of glucose to extract energy for cellular metabolism. Nearly all living organisms carry out glycolysis as part of their metabolism. The process does not use oxygen and is therefore anaerobic. Glycolysis takes place in the cytoplasm of both pro ...
Carbohydrate metabolism2
Carbohydrate metabolism2

... 1.Skeletal muscle functions under both aerobic (resting) and anaerobic (eg, sprinting) conditions, so both aerobic and anaerobic glycolysis operate, depending on conditions. 2.Skeletal muscle contains myoglobin as a reservoir of oxygen. 3.Insulin acts on skeletal muscle to increase uptake of glucose ...
PowerPoint Learning Quest
PowerPoint Learning Quest

... (Note:Where the oil and water come into contact with one another is the hydrophilic end of the lipid molecule.) The oil in the salad dressing, a type of a lipid, separates from the vinegar, which is mostly made up of water. Even when the salad dressing bottle is shaken, the two substances will be fo ...
清华大学本科生考试试题专用纸
清华大学本科生考试试题专用纸

... 2. Which of the following statements about ATP and its roles in cells are true? (2 points) A. The ATP molecule is kinetically unstable and is thus consumed within about one minute following its formation in cells. B. ATP provides free energy to a thermodynamically unfavorable reactions by group tran ...
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Metabolism



Metabolism (from Greek: μεταβολή metabolē, ""change"") is the set of life-sustaining chemical transformations within the cells of living organisms. These enzyme-catalyzed reactions allow organisms to grow and reproduce, maintain their structures, and respond to their environments. The word metabolism can also refer to all chemical reactions that occur in living organisms, including digestion and the transport of substances into and between different cells, in which case the set of reactions within the cells is called intermediary metabolism or intermediate metabolism.Metabolism is usually divided into two categories: catabolism, the breaking down of organic matter by way of cellular respiration, and anabolism, the building up of components of cells such as proteins and nucleic acids. Usually, breaking down releases energy and building up consumes energy.The chemical reactions of metabolism are organized into metabolic pathways, in which one chemical is transformed through a series of steps into another chemical, by a sequence of enzymes. Enzymes are crucial to metabolism because they allow organisms to drive desirable reactions that require energy that will not occur by themselves, by coupling them to spontaneous reactions that release energy. Enzymes act as catalysts that allow the reactions to proceed more rapidly. Enzymes also allow the regulation of metabolic pathways in response to changes in the cell's environment or to signals from other cells.The metabolic system of a particular organism determines which substances it will find nutritious and which poisonous. For example, some prokaryotes use hydrogen sulfide as a nutrient, yet this gas is poisonous to animals. The speed of metabolism, the metabolic rate, influences how much food an organism will require, and also affects how it is able to obtain that food.A striking feature of metabolism is the similarity of the basic metabolic pathways and components between even vastly different species. For example, the set of carboxylic acids that are best known as the intermediates in the citric acid cycle are present in all known organisms, being found in species as diverse as the unicellular bacterium Escherichia coli and huge multicellular organisms like elephants. These striking similarities in metabolic pathways are likely due to their early appearance in evolutionary history, and their retention because of their efficacy.
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